Brake-dog.



A. WILLSON.

BRAKE D06.

APPLlcAnoN FILED JAN. 22. i913.

1, l 37,800. Patented Apr. 27, 1915.

WI TNE S SES ALBERT Vwfririsoiv, or vviivsrow,.,Artizorm.'

Y BRAKE-Doc.

Specification of Letters iEatent.

Application led January 22,1913. Serial No. 743,573..

' To all whom t may concern:

Be it lmown that I, ALBERT WIrLSoN, a citizen of the United States, -residing at Winslow, in the county of Navajo and State of Arizona,y have invented new and useful Improvements in Brake-Dogs, of which the following is a specification. f

My present invention relates to improvements in brake mechanism for railway cars,

vehicles, hoisters, derriclrs and other machinery,and it hasprimarily: for its object the provision of a specially devised spring controlled ratchet dog or pawl, of such novel and peculiar construction' as to bereadilym shifted and retained in coperative relation or in engagement with the ratchet wheel, or

- in such a position as to permit unobstructed Y rotation of the-same.

further object of thefinvention is .to provide a pair of specially arranged leaf or plate springs, so disposed in relation to the dog or pawl as to normally control theV movement thereof, yet permit the desired adjustment should occasion demand.

With the-above and various other objects in view the invention consistsl essentially in the provision .of a Vdog ory pawl having a f diamond shaped lug or projection provided v upon one face thereof,.the latterv adapted to t between two oppositely .for plate springs carried by or mounted within a suitable casing in such a manner' as to control the movement of the dog, yet

permit of its adjustmentas desired.

Certain other features of construction to-V gether with the combinationjand arrangement of the several parts as, will .be hereinafter fully described and specifically I pointed out in the appendedclaims must be reasonably considered in determining the advantages and novel features of thisy inventiOn.r i In describing my invention in detail reference will lbe .had to the accompanying.

drawings wherein like characters denote like or'corresponding parts throughout the several views, and in which:-

Figure 1 is a planview illustrating thev application of the invention. Fig. 2 is an ,3 3 (erige.

yenlarged detail view of i the dog and its operating mechanism, the casing beingshown in section, and Fig. 3 is a section Vonline disposed leaf Referring ynow more particularly to the drawings wherein is illustrated the pre- Patented Apr. 2v, i915., y

ferred form of my invention the numerall designates the car or other platform, and f2.A

the vertically extending brake operating shaft, having the usual ratchet .wheel 3 keyed or otherwise secured thereto.

A plate member 4 is secured to the plat-y form 1, and is provided with a pair of vertically extending screw threaded bolts 5. Apawl or-ratchet dog 6'is pivotally mounted through the medium of a third. vertically 5 extend, isloosely mounted upon the plate' member l and extends transversely across the top face of the pawl 6, and diamond shaped projection 8 iitting within the enlarged central opening4 11 of the casing.-

pairl of oppositely disposed parallel leaf or plate springs 12 kare'mounted upon or withi in suitable slots 13 of theV casing, one spring upon each side mond shaped projection 8 fitting between V of the opening 11, the diathegtwo springs and engaging the inner faces thereof. By fitting the diamond shaped 'projection between the springs as above described the same is normally forcedinto a position. wherein either two parallel faces of the projection lie flush against the springs 12, thus it will be seen that the pawl isheld in sucha manner as to engage or Y entirely disengage theratchet ,wheel 3.

The pawl when in a position as illustrated in- Fig. 1 of the drawings is forced by the springs into. engagement with the ratchet f wheel, the turning of which in one direction i is permitted lwithout shifting the pawl, as

such turning of the wheel will not move thel diamond shaped projection enough to cause a complete shifting of the pawl.

By sufliciently shifting the pawl and causing*4 the other two parallel faces of the diamond shaped projection to lie flush against `extending screw threaded bolt or pin 7 upon.

' the spring, the pawl is held entirely out of engagement lwith the ratchet wheel, and at the sameV time the entire casing isslightly swung upon its pivot, according to the length of the apertures ,of theY casing.

through the medium of a plurality of nuts l Y carried by the vertically extending bolts 5. lt will be seen from the above taken in connection with the accompanying drawings Y that the p awl or dog may be swung into a position Ywhereby it will either engage or disengage the ratchet wheel as desired; that by the provision of the dia-mond shaped projection a slight spring controlledfmovement 'of the pawl is permitted without entirely Y, shifting the saine; and that during the shifting of the pawl the entire casing is slightly V* Vmoved according to the length` of the apertures provided for the purpose of limiting such movement.

Y several parts, provided such changes` fall Y llt-is thought from the foregoing that the advantages land novel features of'iny invention' will be readily comprehended.

j l desire Yitto be understood that I may make slight changes inthe construction and inthe arrangement and vcombination of the within the scope of the subjoined claims.

Havingthus fully described my invention, what l claim as new and desi-re to secure by Letters Patent, is Y Y Y 1. A device as set `forth including a ratchet wheel, a pivoted pawll having van angular( projection symmetrically centered i thereuponY and integral therewith, and a 'pairrof parallel resilient means in contact vwith said projection, to yieldably mount said' pawl in a ,number of positions.

2. A seviceas Serrana inducing a.

Vratchetwheel, a pivoted 'pawll having a diamond shaped projection symmetrically centered thereupon and'integral therewith, and j a pair of parallel'V resilient means, Veach.l of which is inrcontact with a pair of adjacent faces of said projection, to yieldably mount said pawl in any of a number of positions.

3. A device as set forth including a ratchet wheel, a pivoted pawl having a pro- Y' jection formed withone set of adjacent lanv gled faces, and an oppositely disposed setof oppositely parallel faces, and a Yp air of resilientmeans, each in contact with one set ofthe said `angled faces, to yieldably mountY said pawl inany of a-number of positions.

4. A device as set forth including a vratchet wheel, a pivoted pawl having an angular projection symmetrically centered thereupon and integral' therewith, a pair of parallel resilient means in contactwithj said Yprojection to yieldably mount said pawl inAV any `of a number of positions, and means mounting said resilient means for movement independent of said projection.

vmond shapedY projection symmetrically centered thereupon and integralY therewith, a

i pair of parallel resilient means, eachV of A casing cover lal 'is fitted upon the top.' of the casing, the same being held in place which isVV in contact with a pair of adjacent faces of said projection to yieldablyjmount s aid pawl in any of a number of positions,

andA means mounting said resilient meansV for movement independent of saidl projection. f

6. A device as set forth including a ratchet wheel, a pivoted pawl having aprofor movement independent' of said proj ection.

i 7. A devicehas setlforthincluding ratchet wheel, a pivoted pawl having anangularV projection symmetrically centered thereupon and'integral'therewith, a pair of parallel resilient means yin contact-with said projection to4 yieldably mount said pawl ,in

any of a number of positions, a casing -spacedly surroundingsaid i projection for mounting said-'resilient means, andineans rendering said casing Vslidable to grant Aany in'dependency of VmovementV to saidjresilient means relative tosaid projectionLrA y c 8. device: as set' forth including a ratchet wheel, a vpivoted pawl having aY dia- Y mond shaped projectionsymmetrically cen- Y. tered thereupon and integral therewith, Vpair of parallel yresilient means, each of which Vis in v'contact with a pair of adj acent' faces of "said projection to yieldably mount Y said pawl in any of a number of positions,

a casing spacedly'surrounding said projection and mounting said resilientmeans, and means rendering said casing slidable to grant an independency of movement to saidf resilient meansrelative to said projection. v

`9. A device as set forth including a j ratchet wheel, a pivoted pawl having a projectionformed with one `set of adjacent angled faces, .and an voppositely disposed set of loppositely parallel faces, a pair of resili-V ent means, each Vin contactl with one set of the said angled faces to yieldably mount said pawl in any ofl Va number .of positions,

a casing spacedly sur-rounding saidrprojecf" tion andmounting said resilient means, and means rendering y said casing slidablev to vgrant'an independency of movement to said resilient .means relative to said projection. Y

10. `A device asset -forth including a ratchet wheel, a pivotally mounted pawl, an

angular projection formed integrally with said pawl, a casing having .an openingY into which the said projection is fitted, springs carried by said casing, one upon each side of said opening, the said springs adapted to @engage the respective sides of said projection for controlling the ratchet Wheel, a pivoted paWl,` a diamond @engagement lWith the said ratchet, 'and means including a pair of vertically extending parallel bolts for limiting the movevment of the said casing during the shifting Vof the pawl into and out of engagement VWithV the said ratchet, as and for the purand upon the top face of .said

shaped projection paWl, aV loosely mounted casing, the said casing having an openingV formed the said diamond shaped projection is {itted, a pair of oppositely disposed parallel leaf springs mounted upon thesaid casing and extending across said springs adapted to engage `tvvo of parallel faces of the said projection for controlling the movement of the pavvl and for holdingthe said pavvleither into or out of pose set forth. n Y

12.v A' device as set forth including a ratchet wheel, a pivoted pavvl having an angular" projectionv symmetrically 'centered VVVthereupon and integral therewith, a casing Copies of this patentlmavy be obtained for formed With an opening to spacedly surround' said projection, a pair ofparallel resilient means mountedl in said casing to exformed integrally With' therein i into Which n Y projection, v rslidable to grant an independency of movethe said opening, the' the tend across said opening and to contact with said projection, and means rendering said casing slidable to grant an independency of movement to said resilient means With relation to said projection.

13. A device as set forth including a ratchet Wheel, a pivoted pavvl having a diamond shaped projection eccentrically centered thereupon and integral therewith, a

rcasing formed With an opening to spacedly surround. said projection, a pair of parallel resilient means mounted in said casing to extend across said opening and to each contact With a pair ofV adjacent faces of said and means rendering said casing ment to said resilient means VWith relation to said projections.

14. A device as set forth including a ratchet Wheel, a pivoted pavvl, a projection formed on said paWl With one set of angled faces andan oppositely disposed set of oppositely parallel faces, a casing formed With an opening to spacedly surround said projection, 'a pair of parallel resilient means mounted in said casing to extend across said opening and to contact With a pair of adj acent faces of said projection, and means rendering said casing slidable to grant an independency of movement tov said resilient means With relation to said projection.

ALBERT WiLLsoN.

five cents. each, by addressing the Commissioner of Patents, I Washington, 1D. G. 

